Archives for "August, 2007"

Two very similar worksheets looking at the properties of 3-D shapes. Counting the number of faces, edges and vertices can be quite tricky and it is easier to do if there is a shape to look at and pick up. Tetrahedron and octahedron are two new shapes to learn about. A tetrahedron has four faces […]

This is about as hard as it gets when adding in your head. Anything harder it would be expected that written methods would be used. When adding two amounts such as £2.47 + £3.53 in your head most people begin with the pounds – the opposite of written methods. I would look at this sum […]